portlet/src/main/resources/struts-eventing.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
	"https://struts.apache.org/dtds/struts-2.5.dtd">

<struts>
    <package name="eventing" extends="struts-portlet-default" namespace="/eventing">

        <action name="publish" class="org.apache.struts2.portlet.example.eventing.PublishAction">
            <result name="success">/WEB-INF/eventing/index.jsp</result>
        </action>

        <action name="process" class="org.apache.struts2.portlet.example.eventing.ProcessAction">
            <result name="success">/WEB-INF/eventing/process.jsp</result>
            <result name="forward" type="redirectAction">
                <param name="actionName">process</param>
                <param name="namespace">/eventing</param>
            </result>
        </action>
    </package>
</struts>